Authors:

If often happens too, both in courts and in cabinets, that there are two things going on together,--a main plot and an under-plot; and he that understands only one of them will, in all probability, be the dupe of both. A mistress may rule a monarch, but some obscure favorite may rule the mistress.

Charles Caleb Colton (1836). “Lacon: Or, Many Things in Few Words, Addressed to Those who Think”, p.56
If often happens too, both in courts and in cabinets, that there are two things going on together,--a main plot and an under-plot; and he that understands only one of them will, in all probability, be the dupe of both.